Secret Mine Gems

There are 13 Sapphires to be found in the Secret Mine, and certain gems can only be obtained in certain missions, though most gems that appear in a certain mission can also be obtained in later missions. The gems listed are in the order they can be obtained, and in the order they appear in the gem collection screen.

Sapphire 1 - smokehouse (Available in D-1)

Reveal a hidden towel rack on the right side of the Smokehouse, then pull both towels to uncover a hidden area with the gem.

Sapphire 2 - Fisihng Hut (Available in D-1)

There is a small space near the bottom left of the Fishing Hut that hides the gem, squeeze in on the left and retrieve the gem. Look up to change the camera angle if you can't find it.

Sapphire 3 - Old Mine (Available in D-1)

Against the bottom wall in the Old Mine is a peephole showing a nice gem. Luigi can't reach it himself, instead go to the upper level and punt Toad down the small shaft, he will appear at the bottom breaking through the peephole with the gem in tow.

sapphire 4 - High Wires (Available in D-1)

Head north to the High Wires area and take a zip line across to a giant nest. a gem sits atop the nest that can be gotten using the Poltergust.

Sapphire 5 - Airway (Available in D-1)

When you arrive at the Airway with Toad, look through the binoculars into the creepy looking cave puffing cold gusts of air. A gem lies in there, and shortly a bat will take the gem and deposit it in a nearby barrel by the Chalet lift. When you arrive at the lower portion of the Airway, cross the bridge to get the gem.

Sapphire 6 - Chalet Approach (Available in D-2)

Head outside to the Chalet Approach. The grill near the door now has a whole chicken on it. Light in on fire by activating the grill, then bring the burning chicken down the path to a frozen portrait of the gem. Melt it, then reveal the gem with the Darklight.

Sapphire 7 - Prospector's Crossing (Available in D-2)

Make a detour through the Basin towards the Prospector's Crossing. A gem is now buried under the ice. To open the ice up, spin the pickaxe with the Poltergust to reveal some blocks of wood. The pickaxe is hidden, so use the dark-light device at the south exit of the room on the right wall. Use their weight to crack the ice, freeing the gem.

Sapphire 8 - Skip Slope (Available in D-2)

While sliding down the Skip Slope, try and angle Luigi and use timing to slip in to the left path that branches off beind the wheel. It may take a few tries, but the gem lies down that path.

Sapphire 9 - Shaft - Lower (Available in D-2)

When you reach the bottom of the Shaft, tug on the rope, then move the platform up a bit to find a gem that has been uncovered.

Sapphire 10 - Deep Hall (Available in D-2)

Before heading in from the Deep Hall, get another hot rock and aim it near the ceiling where a gem is trapped in ice. Melt it and claim the gem.

Sapphire 11 - Crossroads (available in D-3)

When going through the portal, reveal a hidden box that had the frozen key from the last mission. Travel back through the portal to collect the Spirit Balls, then go back to find a gem.

Sapphire 12 - Crystal Quarry > Chalet (Available in D-3)

Returning to the Crystal Quarry, there is a portal that is now useable as shortcut to the Chalet. Entering it will cause Luigi to fall onto the couch, freeing the gem from its hiding place.

Sapphire 13 - High Wires (available in D-3)

In the Gondola, aim one of the hot coals over at the half frozen tree on the left. The tree will fall over, leading to a lone outhouse that contains a pocket dimension. In the minigame, play a game of snowball tag with several hiders. Be quick to dodge their attack and shoot snowballs back at them to win.